Event: Div 2 (Cracknell 23)

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Opponent Rating Result
Jimmy Blair 1473 0 - 1
Tomas Petrikas 1309 1 - 0
Frederick Fairhurst 1299 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1494 = (4081 + 400 * (2 - 1)) / 3)

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